Blackened Iron Choker

 is an accessory in Tyranny.

Background
This choker seems to shrink and tighten of its own accord. Blood Chanters have been known to don such lethal accessories to satisfy some perverse delight.

Location

 * Lethian's Crossing Oldwalls - Antechamber: Hidden area in the right pillar of the central area, near the upper right beacon.